'Surely' in the Bible

in that our gospel did not come to you merely in words, but in power and in the Holy Spirit and with deep conviction (surely you recall the character we displayed when we came among you to help you).

For we tell you this by the word of the Lord, that we who are alive, who are left until the coming of the Lord, will surely not go ahead of those who have fallen asleep.

Now when they are saying, "There is peace and security," then sudden destruction comes on them, like labor pains on a pregnant woman, and they will surely not escape.